lavaud



D. S.LAVAUD (OTHERWISE KNOWN AS- D. S. DE L'AVAUD), B. F. CLARK, AND'C.W.l BAINES. y APPARATUS FOR USE IN HMPERING AND ANNEAUNG.

M PLICATION FILED MARZ. 1922 i 1,420,379. Patented Junezo, 1922.

4 SHEETS-SHEET l.

4M fr D. S. LAVAUD (OTHERWISE KNOWN AS D. S. DE LAVAUD), B. F. CLARK,AND C. w. BAINES. APPARATUS FOR us5 1N TEMPERING A-Nn ANNEALiNG.

APPLICATION FILED MAR. 2. |922.

Patented June 20, 1922.

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(5 C. tf1/.Baines D. S. LAVAUD (OTHERWISE KNOWN AS D. S. DE LAVAUD), B.F. CLARK..AND G.-W. BAINES.

APPARATUS FOR USE IN TEMPERING AND ANNEALING.

APPLICATION FILED MAR. 2. 1922.

1,420,379 Patented June 20, 1922.

D. S. LAVAUD (OTHERWISE KNOWN AS D. S. DE LAVAUD), Bl F. CLARK, AND C.W. BAINES.

APPARATUS FOR USE IN TEMPERING AND ANNEALING. APPLICATION HLED MAR. 2,1922.

1 ,420,379.. Patented June 20, 1922.

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UNITED sTAras PATENT OFFICE.

DII'IITRI SENSAUD LAVAUD, OTHERWISE KNOX/VN AS DIIVIITRI SENSAIID DELAVAUD, 0F TOIIR/ONTO,k ONTARIO, CANADA. BERNARD FRANCIS CLARK, OELONDON, AND CHARLES WILLIAM BAINES, OF TEELTON MOBRAY, ENGLAND,ASSIGNORS TO THE METALLURGICAL PLANT CONSTRUCTION COMPANY LIMITED, OFMANCHESTER, ENGLAND, A COMPANY 0E GREAT BRITAIN.

APPARATUS FOR USE IN TEMPERING AND ANNEALING.

Application filed March 2, 1922.

To all whom it may concern.'

Be it known that we, Diirrrm SnNsAUD LavnUD, otherwise known as DmirrniSEN- sAUD Dn LAvAUD, a Brazilian citizen, and resident of Toronto, inthe Dominion ol Canada, BERNARD FiLxNcis CLARK, a subject of the King otGreat Britain, and resident of London, England, and CHARLES WILLIAMBAiNns, a subject of the King of Great Britain, and resident of MeltonMowbray, England, have invented new and useful Improvements in orRelating to Apparatus 'for Use in Tempering andAnnealing, ol" which thefollowing is a specitication.

This invention has reference to apparatus for use in tempering andannealing. The primary object ot the rinvention is to p'rovideimprovements in plants wherein the heat contained in metallic or otherobjects after heat treatment,such as annealing, and given oit in acooling chamber to which the objects when suiiiciently heated aretrailsierred is usefully employed.

In accordance with this invention heat utilization apparatus such as asteam gen-k erator with or without a superheatcr is placed in thecooling chamber to usefully absorb the heat given olf by the cooling'objects as distinct 'from absorbing the heat by water acketing the wallof the chamber. Moreover when objects are not passing through theheating chamber or furnace and cooling chamber the heat of the hot airor gases normally used in the heating chamber is utilized by passing thesaid air or gases into and through the cooling chamber for absorption oftheir heat by the heat utilizing apparatus therein.

A further feature ot' the invention consists in the provisionotl meanswhereby each treated object after passage through the cooling chambermay be subjected to a quenching operation or to an operation which coatsor covers it with a preservative or other composition.

To enable the invention to be clearly understood and readily carriedinto etlect the same will now be described more tully with reference tothe accompanying drawings in which Figure l is a longitudinal sectionalele-4 vation of a complete heating and cooling Specification of LettersPatent.

Patented June 20, 1922.

Serial No. 540,480.

plant embodying the features of our invention and adapted particularlyfor the heat treatment of metal pipes.

Figure 2 is a sectional plan approximately on the lines 2-2, 2L-2 ofFigure 1.

Figures 3', il and 5 are vertical cross-sectional views taken on thelines 3 3, 4 4 and 5 5 respectively on Figure 2.

The heating chamber' is designated by the reference letter A, thecooling chamber by B, and the transporting means by C. Beneath theheating chamber A are regenerators a and within and in the upper regionoi the cooling chamber B is a tubular steam generator b. Thetransporting means C are in the i'orm of a pair of endless conveyorchains having spacing prongs c. The pipes gravitatc down rails D fromthe feeding end outside the chamber A to the delivery end outside thechamber B under the control of the chains C which pass around the wheelsE driven by a motor F. The chains themselves are supported and guidedduring' their travel by upper and lower guide rails G and H. .l is areceptacle containing water, oil or other liquid to which the pipes passand through which they'are conveyed by the star shaped revolvingconveyor K driven from the motor F. The gearing from the motor F to thechain C on the one hand and to the revolving conveyor K on the otherhand is such that the spokes of the conveyor K (ro-operate in successionwith illie successive pipes escaping Jfrom the chain L is a tunnelcommunicating outwardly with a smoke stack and inwardly with a centralpassage M situated beneath the cooling chamber and controlled by dampersN and C adapted to be raised and lowered alternately by gearing operatedfrom a common gear wheel P actuated by gearing' outside the plant. Vhenthe damper N is down and the damper O is up, there is a clear way fromthe chamber B down the vertical shafts Q and along passage M to thetunnel L. Cn the other hand when as under normal working conditions thedamper N is up and the damper O is down, there is a clear way 'for thehot air or gases from the chamber A down the vertical passagesA3 andthrough the regenerators a to the pas- F ig. 2. By means of thesedampers R and S either of the corresponding passages may be closed andthe corresponding regenerators a rendered inoperative.

The heating chamber A has side openings controlled by balanced doors Aand communicates direct With the cooling chamber by the archway A2. A3and At are vertical passages communicating-With the heating chamber andthe regenerators a. The passage A4 is the uptake passage from theregenerators to the combustion chamber.

The air and gas for combustion for heating the chamber A is led throughsuitable passages into the mixing chamber A5.

From the foregoing description and ltrom a consideration ol the drawingsit will be understood that during the normal operation of the furnacethe damper N is up and the damper O is down and the heated articles passinto the chamber A Where they are heated by contact with the hot air orgases and then pass into the cooling chamber B Where they give off theirheat to the steam generator and then pass through the quenching orcoating bath or receptacle J. `When articles are not being treated butit is nevertheless desired to keep the heating chamber A hot inreadiness, the damper N is lowered and the damper O is raised so thatthe hot air or gases proceeding from the chamber A pass through thearchway A2 directly to and through the cooling chamber B where the heatis usefully absorbed by the contents of the steam generator the said airor gases proceeding from the chamber B down the shafts Q andalongpassage M to the timnel L.

What We claim andy desire to secure by Letters Patent of the UnitedStates isz l. Apparatus for use in heat treatments such as tempering andannealing, comprising a heating chamber, a cooling chamber, and heatutilizing apparatus comprising a steam generator placed in the coolingchamber to absorb the heat given off by the heated objects when in thecooling chamber.

2. In an annealing furnace having a heating chamber, a cooling chambercontaining means for absorbin heat from the objects or articles as theycool, and means for feeding the objects or articles through saidchambers, the method which comprises normally leading the gases ofcombustion away trom the cooling chamber When said chambers are in useand diverting said gases through said cooling chamber When said chambersare not in use.

3. In an annealing furnace having a heating chamber, a cooling chambercontaining means for absorbing heat from the objects or articles as theycool, means for feeding the objects or articles throughsaid chambers,and a regenerator, the method which comprises normally leading the gasesof combustion through said regenerator when said chambers are in use anddiverting said gases away from said regenerator and through said coolingchamber When said chambers are not in use.

et. Apparatus for use in heat treatments such as tempering andannealing, comprising a heating chamber, a cooling chamber in connectionWith said heating chamber, heat utilizing means-in said cooling chamber,a conveyor for transporting the metallic or other objects through saidheating chamber and cooling chamber, and means whereby, when objects arenot passing through the heating chamber and cooling chamber but saidheating chamber is being maintained hot the hot air or gases therefromare directed into the cooling chamber for absorption of their heat bythe heat utilizing means therein.

5. Apparatus comprising a heating chamber, a cooling chambercommunicating with said heating chamber, a steam generator in saidcooling chamber, transporting means for travel through said chambers,means controlling the passage of heating medium to and from saidchambers and between them and means for subjecting the heat treatedarticles to a liquid quenching or coating operation.

DIMITRI SENSAUD LAVAUD. BERNARD FRANCIS CLARK. CHARLES VILLIAM BAINES.

Titnesses as to Charles William Baines:

EVELYN M. KNIGHT, THos. H. Coon.

